US3031595A - Magnetron tube - Google Patents

Magnetron tube Download PDF

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Publication number
US3031595A
US3031595A US859979A US85997959A US3031595A US 3031595 A US3031595 A US 3031595A US 859979 A US859979 A US 859979A US 85997959 A US85997959 A US 85997959A US 3031595 A US3031595 A US 3031595A
Authority
US
United States
Prior art keywords
tube
electrodes
magnet
cathode
electrode
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US859979A
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English (en)
Inventor
Joseph H Engelman
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Unisys Corp
Original Assignee
Burroughs Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to NL113818D priority Critical patent/NL113818C/xx
Priority to CH226313D priority patent/CH226313A/de
Application filed by Burroughs Corp filed Critical Burroughs Corp
Priority to US859979A priority patent/US3031595A/en
Priority to GB42172/60A priority patent/GB893309A/en
Priority to DE19601414707 priority patent/DE1414707B2/de
Priority to FR846733A priority patent/FR1275971A/fr
Application granted granted Critical
Publication of US3031595A publication Critical patent/US3031595A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/16—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies
    • H05B41/18—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies having a starting switch
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F29/00—Variable transformers or inductances not covered by group H01F21/00
    • H01F29/02—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F29/00—Variable transformers or inductances not covered by group H01F21/00
    • H01F29/02—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings
    • H01F29/025—Constructional details of transformers or reactors with tapping on coil or windings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J25/00—Transit-time tubes, e.g. klystrons, travelling-wave tubes, magnetrons
    • H01J25/50—Magnetrons, i.e. tubes with a magnet system producing an H-field crossing the E-field
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J31/00—Cathode ray tubes; Electron beam tubes
    • H01J31/02—Cathode ray tubes; Electron beam tubes having one or more output electrodes which may be impacted selectively by the ray or beam, and onto, from, or over which the ray or beam may be deflected or de-focused
    • H01J31/06—Cathode ray tubes; Electron beam tubes having one or more output electrodes which may be impacted selectively by the ray or beam, and onto, from, or over which the ray or beam may be deflected or de-focused with more than two output electrodes, e.g. for multiple switching or counting

Definitions

  • magnetron tube includes an electrode assembly which comprises an elongated central cathode and a plurality of groups of elongated electrodes surrounding the cathode and secured together at their opposite ends by means of insulating end disks or plates. All of the electrodes are substantially parallel to each other.
  • An external cylindrical magnet surrounds the tube envelope and electrode assembly.
  • a beam of current flows from the central cathode and is urged to rotate around the tube under the influence of crossed electric and magnetic fields.
  • the beam may remain at one group of electrodes indefinitely, or it may be switched from position to position by the application of proper potentials to selected ones of the tube electrodes.
  • the objects of the present invention are concerned with the provision of an improved construction for a magnetron beam switching tube in which the placement of the means for generating the magnetic field is not critical and, in addition, an improved magnetic field configuration is achieved which provides improved electron beam flow.
  • a magnetron-type electron tube embodying the invention comprises, in a suitable envelope, an electrode assembly including a central longitudinally elongated cathode electrode surrounded by groups of longitudinally elongated electrodes which are adapted to form and receive an electron beam from the cathode.
  • the various electrodes are secured together parallel to each other by means of insulating end disks secured to the opposite ends of the electrodes.
  • an assembly of permanent magnet rods spaced apart uniformly and parallel to each other is provided in place of the conventional cylindrical permanent magnet surrounding the tube.
  • the magnet rod assembly is coaxial with the electrode assembly and may be either outside or inside the tube envelope.
  • FIG. 1 is a perspective view, partly in section, of a "ice magnetron beam switching tube embodying the invention
  • FIG. 2 is a sectional view of a modification of the tube of FIG. 1;
  • FIG. 3 is an elevational view of the tube of FIG. 1 illustrating the general orientation of the magnetic field of the tube.
  • the principles of the invention are applicable to magnetron tubes and, particularly, to a multi-position Type 6700 magnetron beam switching tube.
  • This type of tube is cylindrical in form and includes an envelope 12 which contains a central longitudinally elongated cathode '14 and ten groups of electrodes spaced radially equidistantly from the cathode and surrounding the cathode.
  • Each group of electrodes includes a generally U-shaped elongated spade electrode 16 and a generally L-shaped target electrode 18 positioned so that each target occupies the space between adjacent spade electrodes.
  • Each spade electrode serves to form and hold an electron beam on its corresponding target electrode.
  • a generally rod-like switching electrode 20 is also included in each group of electrodes and is positioned between one edge of each target electrode and the adjacent spade electrode.
  • the switching electrodes are known as switching grids. All of the tube electrodes are secured together by means of top and bottom mica disks 22 and 24.
  • the tube 10 also includes magnet means, to be described, which provides an axial magnetic field which is utilized in conjunction with electric fields within the tube to form and switch an electron beam from the cathode to each of the groups of electrodes.
  • the direction in which the beam switches, that is clockwise or counter-clockwise, is always the same and is determined by the orientation of the electric and magnetic fields.
  • magnet means for obtaining the desired magnetic field in the tube 10 comprises an array of permanent magnet rods 26 provided surrounding and coaxial with the electrode assembly.
  • the corresponding magnetic poles of the rods are oriented adjacent to each other.
  • the magnet rods are placed outside the tube envelope and held in position in any suitable fashion, for example, by means of insulating rings 30 and 32 which are cemented or otherwise held in place surrounding the tube envelope.
  • Substantially any number of magnet rods 26 may be employed, with, for example, one rod for each group of electrodes being satisfactory.
  • the desired magnetic field is provided and, in addition, a more compact tube construction is achieved by mounting the magnet rods 26 inside the tube envelope 1 2 and surrounding the electrode assembly.
  • the mganet rods may be supported in any suitable fashion, for example, by having their ends inserted in suitable apertures in the top and bottom mica disks 22 and 24.
  • An important advantage of this embodiment of the invention is that it reduces the size of the tube.
  • the positioning of the magnet rods is considerably less critical than the positioning of a cylindrical magnet surrounding the tube.
  • the magnet rods seem to provide a magnetic field pattern of the form generally indicated by the fiux lines 34 in FIG. 3.
  • the magnetic flux lines 34 bend toward the center of the elec-, trode cage. This configuration of magnetic flux lines, in conjunction with the electric fields in the tube, tends to limit an electron beam to the center of the cage and prevents fanning out of a beam to strike the top and bottom mica disks.
  • a magnetron tube including an envelope, an electrode assembly in said envelope, said electrode assembly having a longitudinal axis in said envelope and including a central cathode and a plurality of electrodes surrounding said cathode and adapted to receive electron beams from said cathode, and magnet means providing an axial magnetic field in said envelope for controlling the flow of electrons from said cathode to said electrodes said magnet means comprising a plurality of spaced-apart rodlike magnets oriented substantially parallel to each other and parallel to and surrounding said electrode assembly.
  • a magnetron beam switching tube having an electrode assembly including a cathode and a plurality of groups of electrodes; each group of electrodes including a target electrode which receives an electron beam and produces an output signal therefrom, a spade electrode which holds an electron beam on its associated target electrode, and a switching electrode which serves to switch an electron beam from one group of electrodes to the next; and an array of magnet rods surrounding said electrode assembly.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microwave Tubes (AREA)
  • High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
US859979A 1959-12-16 1959-12-16 Magnetron tube Expired - Lifetime US3031595A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
NL113818D NL113818C (xx) 1959-12-16
CH226313D CH226313A (de) 1959-12-16 1942-11-03 Transformator mit über eine Reguliereinrichtung angeschlossenem Verbraucher, der eine veränderliche Spannung benötigt.
US859979A US3031595A (en) 1959-12-16 1959-12-16 Magnetron tube
GB42172/60A GB893309A (en) 1959-12-16 1960-12-07 Improvements in or relating to trochotron tubes
DE19601414707 DE1414707B2 (de) 1959-12-16 1960-12-08 Magnetron-Strahls chaltröhre
FR846733A FR1275971A (fr) 1959-12-16 1960-12-13 Tube électronique à commutation de faisceau

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US859979A US3031595A (en) 1959-12-16 1959-12-16 Magnetron tube

Publications (1)

Publication Number Publication Date
US3031595A true US3031595A (en) 1962-04-24

Family

ID=25332217

Family Applications (1)

Application Number Title Priority Date Filing Date
US859979A Expired - Lifetime US3031595A (en) 1959-12-16 1959-12-16 Magnetron tube

Country Status (5)

Country Link
US (1) US3031595A (xx)
CH (1) CH226313A (xx)
DE (1) DE1414707B2 (xx)
GB (1) GB893309A (xx)
NL (1) NL113818C (xx)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1391726A1 (en) * 2001-05-28 2004-02-25 Sei Matsuoka Apparatus and method for transmitting appreciable information

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1321432A (en) * 1919-11-11 Method of and apparatus for transforming electrical energy
US2244318A (en) * 1937-12-31 1941-06-03 Bell Telephone Labor Inc Electron discharge device
US2857552A (en) * 1954-09-13 1958-10-21 Burroughs Corp Beam tube switching circuits

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1321432A (en) * 1919-11-11 Method of and apparatus for transforming electrical energy
US2244318A (en) * 1937-12-31 1941-06-03 Bell Telephone Labor Inc Electron discharge device
US2857552A (en) * 1954-09-13 1958-10-21 Burroughs Corp Beam tube switching circuits

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1391726A1 (en) * 2001-05-28 2004-02-25 Sei Matsuoka Apparatus and method for transmitting appreciable information
EP1391726A4 (en) * 2001-05-28 2007-08-01 Sei Matsuoka DEVICE AND METHOD FOR TRANSMITTING RECOGNIZABLE INFORMATION

Also Published As

Publication number Publication date
NL113818C (xx)
CH226313A (de) 1943-03-31
GB893309A (en) 1962-04-04
DE1414707B2 (de) 1970-05-27
DE1414707A1 (de) 1968-10-10

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